Asparagus lettuce cutting and harvesting device

Abstract

The asparagus lettuce cutting and harvesting device comprises a walking mechanism, a rotary blade cutting mechanism and a chain shifting fork conveying mechanism. In the walking mechanism, an advancing driving motor drives walking wheels to rotate to achieve advancing. In the rotary blade cutting mechanism, an original motor drives a rotary blade to rotate so as to cut the asparagus lettuce; in the chain shifting fork conveying mechanism, a driving motor drives a chain to rotate, the chain drives a shifting fork to move, and the cut asparagus lettuce is conveyed through the shifting fork on the chain; the storage battery provides power for the three motors, and the working states of the three motors are controlled through the circuit control board. By the adoption of the asparagus lettuce cutting and conveying device, asparagus lettuces can be cut and conveyed and finally packaged in a unified mode, and the problem that the efficiency is low when asparagus lettuces are harvested manually is solved.

Description

Technical Field

[0001] This utility model belongs to the field of lettuce cutting and harvesting technology, specifically a lettuce cutting and harvesting device. Background Technology

[0002] Lettuce, belonging to the genus *Lactuca* of the family Asteraceae, is an annual or biennial herbaceous plant, primarily consumed for its fleshy, tender stems. It has a large cultivation area in China and is one of the country's major vegetable crops. Currently, it is harvested entirely manually, resulting in high labor intensity, low efficiency, and high labor costs. The wholesale price of lettuce fluctuates significantly due to market influences, sometimes even falling below the cost of manual harvesting. Currently, there is a lack of machinery suitable for harvesting above-ground fleshy stem vegetables, forcing many large-scale growers to simply crush the lettuce in the field, leading to resource waste. Furthermore, research on harvesting machinery for most vegetables in China is still in its early stages, with mechanized harvesting of most vegetables, such as cabbage and tomatoes, remaining largely under research. Research on mechanized harvesting technology for fleshy stem vegetables like lettuce has not been reported, creating a technological gap. In contrast, mature and practically applied harvesting machinery abroad mainly focuses on root and leafy vegetables; harvesting machinery for fruiting vegetables is still under development, and similarly, there are no reports on harvesting machinery for fleshy stem vegetables like lettuce. Therefore, to reduce lettuce harvesting costs and improve labor efficiency, there is an urgent need to develop a lettuce harvesting machine. Utility Model Content

[0003] The present invention aims to solve the above problems by providing a lettuce cutting and harvesting device. The harvesting device is novel in design, simple to manufacture, easy to operate, fast and efficient, and can reduce labor costs and labor intensity, making it highly practical.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A lettuce cutting and harvesting device includes a walking mechanism, a rotating blade cutting mechanism, and a chain fork conveying mechanism. The specific structure of the components and their connection relationships are as follows:

[0006] The traveling mechanism includes a base, a forward drive motor, a driving bevel gear shaft, a driving bevel gear, a driven bevel gear, a traveling wheel shaft, and traveling wheels. The forward drive motor is fixed below the base via a motor positioning plate. The output shaft of the forward drive motor is axially connected to the driving bevel gear shaft via a coupling. The driven bevel gear meshes with the driving bevel gear and is axially connected to the traveling wheel shaft via a key and keyway, and is fixed at the middle position of the traveling wheels. The traveling wheel shaft is movably connected to a bearing housing via rolling bearings. The bearing housing is fixed on both sides of the base. The two ends of the traveling wheel shaft are axially connected to two traveling wheels respectively and fixed with nuts.

[0007] The rotary blade cutting mechanism includes a primary motor, a first pulley, a belt, a second pulley, a pulley shaft, a rotary blade, a support plate, and a cutting positioning anti-tipping support plate. The primary motor is fixed to the machine base via a motor positioning plate. The output shaft of the primary motor is axially connected to the pulley shaft via a coupling, driving the first pulley to rotate. The second pulley is connected to the first pulley via a belt, and the second pulley is axially connected to the rotary blade via the pulley shaft. The rotation of the second pulley drives the rotary blade. The support plate is fixed on both sides of the middle of the machine base and positioned above the rotary blade. The cutting positioning anti-tipping support plate is fixed to a positioning and binding bracket.

[0008] The chain fork conveying mechanism includes a base, a drive motor, a sprocket shaft, a first sprocket, a second sprocket, a first chain, a third sprocket, a fourth sprocket, a second chain, a first positioning and binding bracket, a bearing seat, a bearing seat fixing bracket, a fork, a second positioning and binding bracket, and a binding frame. The drive motor is fixed to the base via a motor positioning plate. The output shaft of the drive motor is axially connected to the first sprocket shaft via a coupling, and the motor drives the rotation of the first sprocket. The second sprocket is connected to the first sprocket via the first chain. The second sprocket is axially connected to the sprocket shaft and fixed on one side near the first binding bracket. Both sides of the sprocket shaft are movably connected to the bearing seat via rolling bearings, and the bearing seat is fixed on both sides of the first positioning and binding bracket. The third sprocket is axially connected to the sprocket shaft and fixed in the middle, and is coaxial with the second sprocket. The fourth sprocket is connected to the first chain via a first positioning and binding bracket. The second chain is connected to the third sprocket; the fourth sprocket is axially connected to the sprocket shaft, fixed in the middle, and in the same plane as the third sprocket; the two sides of the sprocket shaft are movably connected to the bearing seats through rolling bearings, and the bearing seats are fixed to the two sides of the second positioning and binding bracket through the bearing seat fixing frame; five shift forks are fixed to the second chain at certain intervals, which serves to transport lettuce; the first positioning and binding frame and the second positioning and binding frame are fixed to the front and rear sides of the machine base by bolts and nuts, which are used to position the three sprockets; the battery and circuit control board are fixed to the machine base, and the battery is connected to the motor control board through wires and then to the three motors. The circuit control board can be used to control the coordinated work of the three motors, and can be remotely controlled to start and stop the three motors; the binding frame is fixed to the rear of the machine base by bolts and nuts.

[0009] The belt is a type B synchronous belt, which has a more compact structure and good wear resistance. The battery used is a 24V battery, and the motors are all 90W DC motors.

[0010] The front end of the machine base is equipped with a support plate and a cutting positioning anti-tipping support plate, which are located above the rotating blade. This prevents the lettuce from falling over and positions the lettuce for cutting, thereby improving the cutting accuracy and efficiency.

[0011] The second chain is set with its central axis tilted at an angle of 25° to the horizontal plane. The center distance between the third and fourth sprockets is set at 80cm. The rotating blade is a disc-type rotary cutter with a diameter of 10cm and a thickness of 5mm. The blade is made of stainless steel, which has certain wear resistance and corrosion resistance. The rotation speed of the rotating blade is set at 360r / min and is at an angle of 5° to the horizontal plane, resulting in better cutting effects such as low cutting resistance and smooth cross-section.

[0012] The five forks are welded and fixed to the chain at the same interval, and the forks are U-shaped. The distance between the two side plates is exactly the thickness of a lettuce stalk, specifically 4cm, which facilitates the clamping and transportation of lettuce.

[0013] According to the design requirements, the fork conveying speed is greater than the forward speed of the walking mechanism driving device, specifically set to 0.5m / s.

[0014] The first chain is a power transmission chain that transmits the power of the drive motor to the second chain, which is fixed with a shift fork.

[0015] The binding frame is fixed at the rear of the machine base and is used for binding the lettuce after it has been transported there. The binding work needs to be done manually.

[0016] The beneficial effects obtained by this utility model are:

[0017] 1. This device can automatically cut, transport and pack lettuce, improving the efficiency of lettuce harvesting and reducing the labor intensity for farmers. It is suitable for use during home harvesting.

[0018] 2. The rotating blade used in this device is a disc-type rotary cutter, which has certain wear resistance and corrosion resistance. The rotation speed of the rotating blade is set to 360r / min and is at an angle of 5° with the horizontal plane, resulting in better cutting effect such as low cutting resistance and smooth cross-section.

[0019] 3. The five shift forks in this device are welded and fixed to the second chain at the same interval, and the shift forks are U-shaped. The distance between the middle of the two side plates is exactly the thickness of a lettuce stalk, specifically 4cm.

[0020] This makes it easier to pick up the lettuce and transport it to the binding frame.

[0021] This device is equipped with a support plate and a cutting positioning anti-tipping support plate, which can prevent the lettuce from falling over and position the lettuce during cutting, thereby improving the cutting accuracy and efficiency.

[0022] This device is an agricultural machine designed for cutting, transporting, and packaging lettuce. It features small size, simple principle, high efficiency, and automation, reducing costs in the lettuce harvesting process, alleviating labor costs, facilitating lettuce cutting and harvesting, and is suitable for small-scale farming operations. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall result of the lettuce cutting and harvesting device described in this utility model.

[0024] Figure 2 This is a schematic diagram of the walking mechanism of a lettuce cutting and harvesting device according to the present invention.

[0025] Figure 3 This is a schematic diagram of the rotating blade cutting mechanism of a lettuce cutting and harvesting device according to the present invention.

[0026] Figure 4 This is a schematic diagram of the chain-driven fork conveying mechanism of a lettuce cutting and harvesting device according to the present invention.

[0027] The components in the diagram are labeled as follows: base 1, forward drive motor 2, drive bevel gear shaft 3, drive bevel gear 4, driven bevel gear 5, traveling wheel shaft 6, traveling wheel 7, primary motor 8, first pulley 9, belt 10, second pulley 11, pulley shaft 12, rotating blade 13, support plate 14, cutting positioning anti-tipping support plate 15, drive motor 16, sprocket shaft 17, first sprocket 18, second sprocket 19, first chain 20, third sprocket 21, fourth sprocket 22, second chain 23, first positioning binding bracket 24, bearing seat 25, bearing seat fixing bracket 26, shift fork 27, second positioning binding bracket 28, binding frame 29, battery 30, circuit control board 31. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings and embodiments.

[0029] First, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] like Figure 1 As shown, the lettuce cutting and harvesting device of this utility model includes a walking mechanism, a rotating blade cutting mechanism, and a chain fork conveying mechanism.

[0032] The traveling mechanism includes a base 1, a forward drive motor 2, a driving bevel gear shaft 3, a driving bevel gear 4, a driven bevel gear 5, a traveling wheel shaft 6, and traveling wheels 7. The forward drive motor 2 is fixed below the base 1 by a motor positioning plate. The output shaft of the forward drive motor 2 is axially connected to the driving bevel gear shaft 3 via a coupling. The driven bevel gear 5 meshes with the driving bevel gear 4 and is axially connected to the traveling wheel shaft 6 via a key and keyway. The traveling wheel shaft 6 is movably connected to a bearing housing 25 via bearings. The bearing housing 25 is fixed on both sides below the base 1. The two ends of the traveling wheel shaft 6 are axially connected to two traveling wheels 7 respectively and fixed with nuts.

[0033] The rotating blade cutting mechanism includes a primary motor 8, a first pulley 9, a belt 10, a second pulley 11, a pulley shaft 12, a rotating blade 13, a support plate 14, and a cutting positioning anti-tipping support plate 15. The primary motor 8 is fixed to the machine base 1 via a motor positioning plate. The output shaft of the primary motor is axially connected to the pulley shaft 12 via a coupling. The primary motor 8 drives the first pulley 9 to rotate. The second pulley 11 is connected to the first pulley 9 via the belt 10. The second pulley 11 and the rotating blade 13 are axially connected via the pulley shaft 12. The rotation of the second pulley 11 drives the rotation of the rotating blade 13. The support plate 14 is fixed on both sides of the middle part of the machine base 1 and is located above the rotating blade 13. The cutting positioning anti-tipping support plate 15 is fixed on the first positioning binding bracket 24.

[0034] The chain fork conveying mechanism includes a base 1, a drive motor 16, a sprocket shaft 17, a first sprocket 18, a second sprocket 19, a first chain 20, a third sprocket 21, a fourth sprocket 22, a second chain 23, a first positioning and binding bracket 24, a bearing seat 25, a bearing seat fixing bracket 26, a fork 27, a second positioning and binding bracket 28, and a binding frame 29. The drive motor 16 is fixed to the base 1 via a motor positioning plate. The output shaft of the drive motor 16 is axially connected to the shaft of the first sprocket 18 via a coupling, and the drive motor 16 drives the first sprocket 18 to rotate. The second sprocket 19 is connected to the first sprocket 18 via the first chain 20. The second sprocket 19 is axially connected to the sprocket shaft 17 and fixed to one side of the first binding bracket 24. The two sides of the sprocket shaft 17 are movably connected to the bearing seats 25 via rolling bearings, and the bearing seats 25 are fixed on both sides of the first positioning and binding bracket 24. The third sprocket 21 is axially connected to the sprocket shaft 17 and fixed in its middle, and is coaxial with the second sprocket 19. The fourth sprocket 22 is connected to the third sprocket 21 via the second chain 23. The fourth sprocket 22 is axially connected to the sprocket shaft 17, fixed in the middle of the sprocket shaft 17, and is in the same plane as the third sprocket 21. The two sides of the sprocket shaft 17 are movably connected to the bearing seats 25 via rolling bearings, and the bearing seats 25 are fixed on both sides of the second positioning and binding bracket 28 via the bearing seat fixing bracket 26. Five forks 27 are fixed to the second chain 23 at certain intervals to transport lettuce. The first positioning and binding frame 24 and the second positioning and binding frame 28 are fixed to the front and rear sides of the base 1 by bolts and nuts to axially position the three sprockets. The battery 30 and the circuit control board 31 are fixed to the base 1. The battery 30 is connected to the motor control board by wires and then connected to the forward drive motor, the original motor and the drive motor. The circuit control board 31 is used to control the coordinated work of the three motors and can control the start and stop of the three motors by remote control. The binding frame 29 is fixed to the rear of the base 1 by bolts and nuts.

[0035] The belt 10 is a type B synchronous belt, which has a more compact structure and good wear resistance. The battery 30 is a 24V battery, and all motors are 90W DC motors.

[0036] The front end of the base 1 is provided with a support plate 14 and a cutting positioning anti-tipping support plate 15, which are located above the rotating blade 13. This can prevent the lettuce from falling over and can cut and position the lettuce, thereby improving the cutting accuracy and efficiency.

[0037] The second chain 23 is set with its central axis tilted at an angle of 25° to the horizontal plane. The center distance between the third sprocket 21 and the fourth sprocket 22 is set at 80cm. The rotating blade 13 is a disc-type rotary cutter with a diameter of 10cm and a thickness of 5mm. The cutter is made of stainless steel, which has certain wear resistance and corrosion resistance. The rotation speed of the rotating blade is set at 360r / min, and it forms an angle of 5° with the horizontal plane, with the front lower than the back and tilted forward. Under this angle, the cutting resistance is small and the cutting surface is smooth.

[0038] The five forks 27 are welded and fixed to the second chain 23 at the same interval, and the forks are U-shaped. The distance between the two side plates is exactly the thickness of a lettuce stalk, specifically 4cm, which facilitates the clamping and transportation of lettuce.

[0039] According to the design requirements, the conveying speed of the chain fork is greater than the forward speed of the walking mechanism drive device, specifically set to 0.5m / s.

[0040] The first chain 20 is a power transmission chain that transmits the power of the drive motor to the second chain 23, which is fixed with a shift fork.

[0041] The binding frame 29 is fixed at the rear of the base 1 and is used for binding the lettuce after it is transported there. The binding work needs to be done manually.

[0042] The working principle is as follows:

[0043] The battery 30 provides power to the forward drive motor 2, the original motor 8, and the drive motor 16. The circuit control board 31 can be used to control the coordinated operation of the three motors and can control the start and stop of the three motors via remote control.

[0044] Start the forward drive motor 2, which transmits power to the driving bevel gear 4. Due to the meshing of the two bevel gears, the driving bevel gear 4 transmits the driving force to the driven bevel gear 5, causing the driven bevel gear 5 to rotate. The driven bevel gear 5 is axially connected to the walking wheel shaft 6, which drives the walking wheel 7 to rotate. The rotation of the walking wheel 7 drives the entire device forward. The device can be stopped by remotely turning off the forward drive motor 2.

[0045] The primary motor 8 is started, transmitting driving force to the first pulley 9. The first pulley 9 then transmits power to the second pulley 11 via the belt 10. Since the second pulley 11 is axially connected to the rotating blade 13, it drives the rotating blade 13 to rotate rapidly, thus cutting the lettuce. Simultaneously, the drive motor 16 is started, transmitting power to the first sprocket 18 via the output shaft and coupling. The first sprocket 18 transmits power to the second sprocket 19 via a chain sprocket pair. Since the second sprocket 19 and the third sprocket 21 are coaxial and both are axially connected to the sprocket shaft 17 on the first binding and positioning bracket 24, they drive the rotation of the third sprocket 21 and the sprocket shaft 17. The third sprocket 21, the fourth sprocket 22, and the second chain 23 form a chain sprocket pair, so the rotation of the third sprocket 21 drives the movement of the second chain 23.

[0046] When the device starts working, the support plate 14 and the cutting positioning anti-tipping support plate 15 at the front end of the machine base 1 can prevent the lettuce from falling over and cut and position the lettuce. The lettuce that enters between the two support plates 14 is quickly cut by the rotating blade 13 with a certain tilt angle, resulting in a flat cut and smooth cross-section. After being cut, the lettuce will not fall over immediately due to the presence of the cutting positioning anti-tipping support plate 15. Instead, as the second chain 23 rotates, the evenly distributed forks 27 on it will clamp the cut lettuce and transport it with the chain to the binding bracket 29 at the rear of the machine base, which will facilitate subsequent manual binding and storage.

Claims

1. A lettuce cutting and harvesting device, comprising a walking mechanism, characterized in that: It also includes a rotary blade cutting mechanism and a chain fork conveying mechanism. The specific structure of the components and their connection relationships are as follows: The rotary blade cutting mechanism includes a primary motor, a first pulley, a belt, a second pulley, and a rotary blade. The primary motor is fixed on the base. The output shaft of the primary motor is axially connected to the shaft of the first pulley via a coupling. The second pulley is connected to the first pulley via a belt. The second pulley and the rotary blade are axially connected via the pulley shaft. The primary motor drives the first pulley to rotate, the rotation of the first pulley drives the rotation of the second pulley, and the rotation of the second pulley drives the rotary blade to rotate. The chain fork conveying mechanism includes a drive motor, a first sprocket, a second sprocket, a first chain, a third sprocket, a fourth sprocket, a first positioning and binding bracket, a fork, a second positioning and binding bracket, and a binding frame. The drive motor is fixed to the base. The output shaft of the drive motor is axially connected to the shaft of the first sprocket. The second sprocket is connected to the first sprocket via the first chain. The second sprocket is axially connected to the shaft of the sprocket, and both sides of the shaft are movably connected to bearing seats via bearings. The bearing seats are fixed to both sides of the first positioning and binding bracket. The third sprocket is axially connected to the shaft of the sprocket. The connection is fixed, with the third sprocket coaxial with the second sprocket, and the fourth sprocket connected to the third sprocket via the second chain; the two sides of the sprocket shaft of the fourth sprocket are movably connected to the bearing seats via bearings, and the bearing seats are fixed to both sides of the second positioning and binding bracket via bearing seat fixing frames; multiple shift forks are fixed to the second chain at certain intervals; the first positioning and binding frame and the second positioning and binding frame are fixed to the front and rear sides of the base via bolts and nuts; the battery and circuit control board are fixed to the base, and the battery is connected to the motor control board via wires and then connected to the original motor and drive motor.

2. The lettuce cutting and harvesting device according to claim 1, characterized in that: The traveling mechanism includes a forward drive motor and traveling wheels; the forward drive motor is fixed below the base; the output shaft of the forward drive motor is axially connected to the shaft of the driving bevel gear via a coupling, the driven bevel gear meshes with the driving bevel gear, and is axially connected to the shaft of the traveling wheel via a key and keyway, and is fixed in the middle position of the traveling wheel; the shaft of the traveling wheel is movably connected to the bearing housing via bearings, the bearing housing is fixed on both sides of the base, and both ends of the shaft of the traveling wheel are axially connected to two traveling wheels respectively; the forward drive motor is connected to the circuit control board.

3. The lettuce cutting and harvesting device according to claim 1, characterized in that: The second chain is set at a 25° angle between its central axis and the horizontal plane.

4. The lettuce cutting and harvesting device according to claim 1, characterized in that: The rotating blade is a disc-type rotary cutter, with the rotating blade at a 5° angle to the horizontal plane, and the front is lower than the back.

5. The lettuce cutting and harvesting device according to claim 1, characterized in that: The front end of the machine base is provided with a support plate and a cutting positioning anti-tipping support plate; the support plate is fixed on both sides of the middle of the front end of the machine base and is located above the rotating blade; the cutting positioning anti-tipping support plate is fixed on the positioning binding bracket.

6. The lettuce cutting and harvesting device according to claim 1, characterized in that: The fork is U-shaped, and the distance between the two side plates of the fork is exactly the thickness of a lettuce stalk.

7. The lettuce cutting and harvesting device according to claim 1, characterized in that: It also includes a binding frame, which is fixed to the rear of the machine base by bolts and nuts.

8. The lettuce cutting and harvesting device according to claim 1, characterized in that: The belt used is a type B synchronous belt.

9. The lettuce cutting and harvesting device according to claim 1, characterized in that: The battery is a 24V battery; the original motor, the forward drive motor, and the drive motor are all 24V, 90W DC motors.

10. The lettuce cutting and harvesting device according to claim 1, characterized in that: The linear velocity of the second chain is greater than the forward speed of the walking mechanism.

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